msvcp90: Added basic_string<char> clear implementation.

dlls/msvcp90/msvcp90.spec

@@ -3071,12 +3071,12 @@
 @ stub -arch=win64 ?clear@?$basic_ios@_WU?$char_traits@_W@std@@@std@@QEAAXH_N@Z
 @ stub -arch=win32 ?clear@?$basic_ios@_WU?$char_traits@_W@std@@@std@@QAEXI@Z
 @ stub -arch=win64 ?clear@?$basic_ios@_WU?$char_traits@_W@std@@@std@@QEAAXI@Z
-@ stub -arch=win32 ?clear@?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@QAEXXZ
-@ stub -arch=win64 ?clear@?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@QEAAXXZ
+@ thiscall -arch=win32 ?clear@?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@QAEXXZ(ptr) MSVCP_basic_string_char_clear
+@ cdecl -arch=win64 ?clear@?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@QEAAXXZ(ptr) MSVCP_basic_string_char_clear
 @ stub -arch=win32 ?clear@?$basic_string@GU?$char_traits@G@std@@V?$allocator@G@2@@std@@QAEXXZ
 @ stub -arch=win64 ?clear@?$basic_string@GU?$char_traits@G@std@@V?$allocator@G@2@@std@@QEAAXXZ
-@ stub -arch=win32 ?clear@?$basic_string@_WU?$char_traits@_W@std@@V?$allocator@_W@2@@std@@QAEXXZ
-@ stub -arch=win64 ?clear@?$basic_string@_WU?$char_traits@_W@std@@V?$allocator@_W@2@@std@@QEAAXXZ
+@ thiscall -arch=win32 ?clear@?$basic_string@_WU?$char_traits@_W@std@@V?$allocator@_W@2@@std@@QAEXXZ(ptr) MSVCP_basic_string_wchar_clear
+@ cdecl -arch=win64 ?clear@?$basic_string@_WU?$char_traits@_W@std@@V?$allocator@_W@2@@std@@QEAAXXZ(ptr) MSVCP_basic_string_wchar_clear
 @ stub -arch=win32 ?clear@ios_base@std@@QAEXH@Z
 @ stub -arch=win64 ?clear@ios_base@std@@QEAAXH@Z
 @ stub -arch=win32 ?clear@ios_base@std@@QAEXH_N@Z

dlls/msvcp90/string.c

@@ -1156,6 +1156,14 @@ void __thiscall MSVCP_basic_string_char_resize(
     MSVCP_basic_string_char_resize_ch(this, size, '\0');
 }
 
+/* ?clear@?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@QAEXXZ */
+/* ?clear@?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@QEAAXXZ */
+DEFINE_THISCALL_WRAPPER(MSVCP_basic_string_char_clear, 4)
+void __thiscall MSVCP_basic_string_char_clear(basic_string_char *this)
+{
+    basic_string_char_eos(this, 0);
+}
+
 
 /* basic_string<wchar_t, char_traits<wchar_t>, allocator<wchar_t>> */
 /* ?npos@?$basic_string@_WU?$char_traits@_W@std@@V?$allocator@_W@2@@std@@2IB */
@@ -1815,3 +1823,11 @@ void __thiscall MSVCP_basic_string_wchar_resize(
 {
     MSVCP_basic_string_wchar_resize_ch(this, size, '\0');
 }
+
+/* ?clear@?$basic_string@_WU?$char_traits@_W@std@@V?$allocator@_W@2@@std@@QAEXXZ */
+/* ?clear@?$basic_string@_WU?$char_traits@_W@std@@V?$allocator@_W@2@@std@@QEAAXXZ */
+DEFINE_THISCALL_WRAPPER(MSVCP_basic_string_wchar_clear, 4)
+void __thiscall MSVCP_basic_string_wchar_clear(basic_string_wchar *this)
+{
+    basic_string_wchar_eos(this, 0);
+}